EP0640158B1 - Procede de sechage de bandes de papier - Google Patents

Procede de sechage de bandes de papier Download PDF

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Publication number
EP0640158B1
EP0640158B1 EP93908937A EP93908937A EP0640158B1 EP 0640158 B1 EP0640158 B1 EP 0640158B1 EP 93908937 A EP93908937 A EP 93908937A EP 93908937 A EP93908937 A EP 93908937A EP 0640158 B1 EP0640158 B1 EP 0640158B1
Authority
EP
European Patent Office
Prior art keywords
accordance
pressing
paper web
web
pressing zone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93908937A
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German (de)
English (en)
Other versions
EP0640158A1 (fr
Inventor
Reinhard Bluhm
Thomas GÖTZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Sulzer Papiertechnik Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Sulzer Papiertechnik Patent GmbH
Publication of EP0640158A1 publication Critical patent/EP0640158A1/fr
Application granted granted Critical
Publication of EP0640158B1 publication Critical patent/EP0640158B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0281—Wet presses in combination with a dryer roll

Definitions

  • the invention relates to a method for drying a paper web in the Preamble of claim 1 indicated type.
  • a method is known for example from GB-A-2 199 398.
  • a moist web is first formed in paper production, the then dewatered and dried to make the paper usable do.
  • Methods can be used for this, in which a relatively large steam-heated drying cylinder is necessary.
  • Such cylinders, their manufacture and assembly are very complex, are also called Yankee cylinders. you reach Diameters of over 5 m and are often with steam pressure in the cylinder up to 8 bar operated.
  • a scraper can be used on a Surface-adhering, dried paper web on the hot press roller during removal be upset.
  • other options are also known, e.g. the uncreped Web with a dry weight of less than 95% on a separate crepe cylinder ready to dry and then crepe.
  • the invention has for its object to provide a method of the type mentioned, with which a high drying performance is achieved and also a high volume Paper quality is possible.
  • the specified paper types can be used with smaller ones Units are dried as before, with the particular Conditions at the exit of the web from the press nip an increase in volume of the paper can be achieved.
  • This additional volume is generated in that a part of the in the Residual water located on the track is controlled as a result of the sudden relaxation evaporates and loosens the fiber structure of the paper web before all fiber bonds were created by hydrogen bonds.
  • the aforementioned Sudden relaxation causes the fibers to be erected on the surface a desired subjective softness, i.e. a "soft grip" can be achieved.
  • Press devices with one or more are used to carry out the method Press nips, with a short or extended press nip conceivable.
  • a short press nip is mostly due to the pressing of rollers with hard and only slight deformable coats produced (Hartnip).
  • An extended press nip (wide nip) can be formed in that the pressing force in the direction of the paper web movable press shoe is applied, which is an impermeable deformable endless coat carries, the shape of the press shoe is designed so that the deformable mante hugs the shape of the counter roll.
  • the so-called hygiene papers are produced in the sheet forming part of the paper machine in a relatively easy path.
  • the sheet weight of such paper is between 10 and 40 g / m 2 , measured on the dry web. Values between 40 and 60 g / m 2 are considered extreme for hygienic papers, whereby it must be taken into account that an increase in the sheet weight, based on the sheet weight in the wet section of the paper machine, is achieved by a possible creping process.
  • the method according to the invention can then also be of good hygiene paper quality lead when working without a crepe scraper.
  • Crepe scrapers expand the Possibility to influence the paper quality, on the other hand, are complex and can be a source of increased wear. Because of the special conditions, that prevail in the method according to the invention can volume, grip and Surface softness should be so good that the creping can be saved.
  • GB-A-2 199 398 is concerned with the production of normal papers. It Measures are proposed that make such a normal Papers can avoid harmful effect of delamination.
  • the here exaggerated thick paper web B is from a wet screen 4 over a Pick-up sucker 5 added and with a felt 3 or the like.
  • the pressing device 1 fed.
  • it is a wide nip press with 2 rollers 9 and 9 ' formed, wherein a press shoe 7 movable in the pressing direction the elastic jacket 8 presses against the counter roller 9 in such a way that the elastic jacket 8 to the Contour of the counter roller 9 nestles.
  • the one to carry out the procedure required heat can - as in this case - by heating the counter roller 9 be made with the help of an outer heating element 10.
  • a steam box 6 directly heating the web and the felt 3 or another Heating device conceivable.
  • the heated paper web remains on leaving the press nip 2 on the counter roller 9, is then creped over a scraper 11 and on a Winding roll 12 wound.
  • an adhesive is applied via the spray tube 14. It can, like here drawn with a thin coating, the so-called coat, on the outer surface of the Roll 9 happen, but also by spraying directly onto the web B, if its Penetration can be accepted. Conveniently removes one Cleaning scraper 13 remnants of material from the roller 9.
  • the method can also be carried out if the Counter roll is not arranged below but above the shoe press. Furthermore a decrease in the dried paper web is shown without a creping scraper. The depends essentially on the type of paper and the process parameters.
  • the Press device can - as shown for example in Fig. 3 - also two press nips 2, each formed by press roll 9 'and counter roll 9, contained by the Paper web B can be run through together with the felt 3 in succession.
  • Breitnip presses are not used. But it is also one Combination of wide nip and hard nip press conceivable, with the order first Hartnip, then Breitnip in general would be particularly advantageous (Fig.
  • FIG. 5 shows schematically that the heating can also be carried out with the aid of electrical heating rods or tubes 10 ′′ for a heat transfer medium which are introduced into the interior of the counter-roller. This also applies to the other arrangements.
  • Fig. 7 shows the technical conditions in the press nip a little more detailed Breitnip press suitable for carrying out the process.
  • a pressure chamber 15 shown as an example is via a channel 16 with a pressure pocket 17 connected via the flexible jacket 8 with hydrostatic Average transfers the pressure to the web B.
  • the press shoe is used by the elastic sheath 8 covered, which is the shape of the cylindrical sheath the counter roller 9 adjusts.
  • Both a felt 3 or the like run through the press nip 2 also the web B. At the end of the press nip 2, the web B remains on the counter roller 9, while the felt 3 is carried away.
  • the web B is by the crepe scraper 11th compressed and then also removed in front of the counter roller 9.
  • the paper web is creped with the scraper 11 and thus also receives Volume effect the desired properties.
  • the precondition for this is that the Web on the counter roll after passing through the press nip.
  • a covering suitable for the high temperatures can be used for certain Liability can be ensured in production cases.
  • suitable agent is added directly to the pulp or sprayed onto the web shortly before entering the press nip is the Temperature resistance of this agent is less critical.
  • a heater 10 'and a heater 10 " drawn in behind the press nip 2 likewise an external heating device 10.
  • an induction device 18 is present, which in -metallic- jacket of the counter roller 9 locally targeted and very controllable heat generated.
  • Another possibility would be e.g. given the pressure medium for the Heat press shoe, but the heat from the felt 3 or the like. would have to be transported through before it, as desired, the paper web reached.
  • the method for drying a voluminous paper web is particularly directed on the production of hygiene paper. Instead of a relatively large one, Steam heated drying cylinders use the moist paper web in one or more heated presses dried. Otherwise, when leaving the press nip unwanted delamination of the paper web due to sudden relaxation of the Flash vapor specifically to improve the volume and softness of the so produced Paper quality exploited.
  • Steam heated drying cylinders use the moist paper web in one or more heated presses dried. Otherwise, when leaving the press nip unwanted delamination of the paper web due to sudden relaxation of the Flash vapor specifically to improve the volume and softness of the so produced Paper quality exploited.
  • both with short and extended press nips can be provided.

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  • Paper (AREA)
  • Drying Of Solid Materials (AREA)

Claims (17)

  1. Procédé pour sécher une bande de papier (B), selon lequel la bande de papier humide (B) est guidée avec au moins un feutre (3) absorbant l'eau ou un moyen analogue à travers au moins une zone de compression (2) formée entre deux surfaces de compression (8, 9, 9') et avant et/ou dans la zone de compression (2) on apporte à la bande de papier (B) suffisamment de chaleur pour que la pression de vapeur dégagée dans le réseau de fibres de la bande de papier (B) soit supérieure à la pression ambiante,
    caractérisé en ce que
    pour fabriquer du papier hygiénique d'un grammage compris entre 10 et 40 g/m2, on met la bande de papier (B) à une teneur en matière sèche d'au moins 60 % en ce que, d'une part, on induit dans la bande de papier (B) seulement la chaleur nécessaire pour que la pression de vapeur formée dans le réseau de fibres de la bande de papier (B) soit inférieure à la pression de compression régnant dans la zone de compression (2), et, d'autre part, on régle les conditions de pression et de température dans la zone de compression (2) pour qu'à la fin de la zone de compression (2), la pression de vapeur dans le liquide soit juste supérieure à la pression ambiante, afin qu'une partie de l'eau résiduelle de la bande se vaporise de manière contrôlée, lors de la détente brutale, à la sortie de la bande de papier (B) de l'intervalle de compression (2) et ameublisse le réseau de fibres de la bande de papier (B).
  2. Procédé selon la revendication 1,
    caractérisé en ce qu'
    on apporte également de la chaleur à la bande de papier après sa sortie de la zone de compression.
  3. Procédé selon la revendication 1,
    caractérisé en ce que
    les surfaces de compression constituent une zoné de compression allongée.
  4. Procédé selon la revendication 1,
    caractérisé par
    deux zones de compression situées l'une derrière l'autre dans le sens de défilement de la bande.
  5. Procédé selon la revendication 4,
    caractérisé en ce que
    dans la zone de compression on chauffe la bande de papier pour que le développement de la vapeur soulève la bande par rapport à la surface de compression qui n'est pas en contact avec le feutre et dépose cette bande sur le feutre.
  6. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    dans la dernière zone de compression on chauffe la bande de papier pour que le développement de la vapeur soulève la surface de compression qui n'est pas en contact avec le feutre et soit finalement évacué.
  7. Procédé selon la revendication 5,
    caractérisé en ce que
    la bande de papier évacuée est enroulée ou subit la poursuite du traitement sans être crêpée.
  8. Procédé selon la revendication 1,
    caractérisé en ce que
    dans la dernière zone de pression la température en surface d'une surface de compression est au moins égale à 150°C.
  9. Procédé selon la revendication 8,
    caractérisé en ce que
    dans la dernière zone de compression la température en surface d'une surface de compression est d'environ 300°C.
  10. Procédé selon la revendication 1,
    caractérisé en ce que
    la bande est fournie avec une teneur en matière sèche initiale comprise entre 10 et 30 % de dessication absolue dans la première zone de compression.
  11. Procédé selon la revendication 1,
    caractérisé en ce qu'
    on choisit les paramètres pour qu'après le séchage, la bande possède une teneur en matière sèche supérieure à 80 % de dessication absolue dans la dernière zone de compression.
  12. Procédé selon la revendication 1,
    caractérisé en ce que
    la température de la bande est comprise entre 50°C et 100°C en amont de la dernière zone de compression.
  13. Procédé selon la revendication 12,
    caractérisé en ce que
    la température de la bande est au moins égale à 80°C avant la dernière zone de compression.
  14. Procédé selon la revendication 1,
    caractérisé en ce que
    le temps de séjour de la bande dans la zone de compression respective est égal à au moins 15 msec.
  15. Procédé selon la revendication 1,
    caractérisé en ce que
    la pression de compression dans la zone de compression respective est égale à au moins 10 bars.
  16. Procédé selon la revendication 1,
    caractérisé en ce que
    l'apport de chaleur se fait par une surface de compression.
  17. Procédé selon la revendication 1,
    caractérisé en ce que
    l'apport de chaleur se fait en amont d'une zone de compression.
EP93908937A 1992-05-16 1993-04-13 Procede de sechage de bandes de papier Expired - Lifetime EP0640158B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4216264 1992-05-16
DE4216264A DE4216264C2 (de) 1992-05-16 1992-05-16 Verfahren zum Trocknen und Auflockern einer Papierbahn
PCT/EP1993/000890 WO1993023613A1 (fr) 1992-05-16 1993-04-13 Procede et dispositif de sechage de bandes de papier

Publications (2)

Publication Number Publication Date
EP0640158A1 EP0640158A1 (fr) 1995-03-01
EP0640158B1 true EP0640158B1 (fr) 1999-07-14

Family

ID=6459075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93908937A Expired - Lifetime EP0640158B1 (fr) 1992-05-16 1993-04-13 Procede de sechage de bandes de papier

Country Status (5)

Country Link
US (1) US5556511A (fr)
EP (1) EP0640158B1 (fr)
AT (1) ATE182193T1 (fr)
DE (2) DE4216264C2 (fr)
WO (1) WO1993023613A1 (fr)

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US5439559A (en) * 1994-02-14 1995-08-08 Beloit Technologies Heavy-weight high-temperature pressing apparatus
DE4410129A1 (de) * 1994-03-24 1995-09-28 Kleinewefers Gmbh Preßvorrichtung für bahnförmiges Material
WO1997016593A1 (fr) * 1995-11-02 1997-05-09 Beloit Technologies, Inc. Train de sechage par pressage force et chauffage pour papier mousseline
US6350349B1 (en) * 1996-05-10 2002-02-26 Kimberly-Clark Worldwide, Inc. Method for making high bulk wet-pressed tissue
DE19650396A1 (de) 1996-12-05 1998-06-10 Voith Sulzer Papiermasch Gmbh Entwässerungspresse
US6139686A (en) * 1997-06-06 2000-10-31 The Procter & Gamble Company Process and apparatus for making foreshortened cellulsic structure
DE19756422A1 (de) 1997-12-18 1999-06-24 Voith Sulzer Papiertech Patent Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Tissue-Papierbahn
SE512944C2 (sv) 1998-10-01 2000-06-12 Sca Research Ab Metod att framställa papper med ett tredimensionellt mönster
US6248210B1 (en) 1998-11-13 2001-06-19 Fort James Corporation Method for maximizing water removal in a press nip
US6432272B1 (en) 1998-12-17 2002-08-13 Kimberly-Clark Worldwide, Inc. Compressed absorbent fibrous structures
DE19860687A1 (de) * 1998-12-29 2000-07-06 Voith Sulzer Papiermasch Gmbh Maschine sowie Verfahren zur Herstellung einer Faserstoffbahn
US6513425B1 (en) * 1999-05-05 2003-02-04 Metso Paper Karlstad Ab Assembly for positioning a heater in a relation to a roll, and a press device with such an assembly
SE514107C2 (sv) * 1999-05-05 2001-01-08 Valmet Karlstad Ab Arrangemang för positionering av en värmare vid en vals och en pressanordning med ett sådant arrangemang
SE516663C2 (sv) 1999-06-17 2002-02-12 Metso Paper Karlstad Ab Torkparti i en maskin för tillverkning av en kontinuerlig tissuepappersbana samt metod för torkning av en kontinuerlig
US6395136B1 (en) 1999-06-17 2002-05-28 Valmet-Karlstad Aktiebolag Press for imprinting and drying a fibrous web
SE514419C2 (sv) * 1999-06-17 2001-02-19 Valmet Karlstad Ab Förfarande vid ett maskinarrangemang i en maskin för tillverkning av en mönsterpräglad kontinuerlig bana av cellulosahaltigt fibermaterial samt maskinarrangemang
US6790315B2 (en) 1999-06-17 2004-09-14 Metso Paper Karlstad Ab Drying section and method for drying a paper web
US6398909B1 (en) 1999-06-17 2002-06-04 Valmet-Karlstad Aktiebolag Method and apparatus for imprinting, drying, and reeling a fibrous web
US6187139B1 (en) * 1999-07-13 2001-02-13 Fort James Corporation Wet creping process
DE19962708A1 (de) * 1999-12-23 2001-06-28 Voith Paper Patent Gmbh Pressenanordnung
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US6860968B1 (en) 2000-05-24 2005-03-01 Kimberly-Clark Worldwide, Inc. Tissue impulse drying
US6585861B2 (en) * 2000-12-19 2003-07-01 Metso Paper Karlstad Ab Device for producing an extensible paper having a three-dimensional pattern
US6752907B2 (en) 2001-01-12 2004-06-22 Georgia-Pacific Corporation Wet crepe throughdry process for making absorbent sheet and novel fibrous product
EP1304413A3 (fr) 2001-10-18 2004-05-12 Voith Paper Patent GmbH Section de séchage et un appareil de lissage pour la section de séchage
DE10151457A1 (de) * 2001-10-18 2003-04-30 Voith Paper Patent Gmbh Verfahren zum kombinierten Trocknen und Glätten einer Materialbahn und Glättvorrichtung
FI116734B (fi) * 2001-10-25 2006-02-15 Metso Paper Inc Menetelmä paperi- tai kartonkirainan käsittelemiseksi ja paperi- tai kartonkirainan käsittelylaite
DE10256998B4 (de) * 2002-12-06 2006-04-06 Voith Paper Patent Gmbh Breitnipkalander
DE102007060400B3 (de) * 2007-12-14 2009-05-28 Andritz Küsters Gmbh Vorrichtung zum Bilden eines Langspalts
CA2735867C (fr) 2008-09-16 2017-12-05 Dixie Consumer Products Llc Feuille de base d'emballage alimentaire a microfibre de cellulose regeneree
SE533043C2 (sv) * 2008-09-17 2010-06-15 Metso Paper Karlstad Ab Tissuepappersmaskin
DE102019119905A1 (de) 2019-07-23 2021-01-28 Voith Patent Gmbh Schuhpresse
DE102019119894A1 (de) 2019-07-23 2021-01-28 Voith Patent Gmbh Presseneinheit

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Also Published As

Publication number Publication date
WO1993023613A1 (fr) 1993-11-25
ATE182193T1 (de) 1999-07-15
DE4216264C2 (de) 2000-05-25
DE59309697D1 (de) 1999-08-19
DE4216264A1 (de) 1993-11-18
EP0640158A1 (fr) 1995-03-01
US5556511A (en) 1996-09-17

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